Observers are a small framework that allow users to attach code to the execution of SimpleNets and Operators.
An example of an Observer is the TimeObserver
, used as follows:
unique_ptr<TimeObserver<NetBase>> net_ob = make_unique<TimeObserver<NetBase>>(net.get()); auto* ob = net->AttachObserver(std::move(net_ob)); net->Run(); LOG(INFO) << "av time children: " << ob->average_time_children(); LOG(INFO) << "av time: " << ob->average_time();
model.net.AttachTimeObserver() ws.RunNet(model.net) ob = model.net.GetObserver() print("av time children:", ob.average_time_children()) print("av time:", ob.average_time())
To implement an observer you must inherit from ObserverBase
and implement the Start
and Stop
functions.
Observers are instantiated with a subject
of a generic type, such as a Net
or Operator
. The observer framework is built to be generic enough to “observe” various other types, however.